Introduction
Children with celiac disease (CeD) may face an increased risk for avoidant/restrictive food intake disorder (ARFID, first defined in the Diagnostic and Statistical Manual of Mental Disorders [DSM]-5 in 2013) due to generalized fear of adverse consequences associated with gluten exposure. However, population-based evidence linking CeD to the development of ARFID is lacking.
Aims & Methods
To investigate the risk of incident ARFID-like phenotype before adulthood in children with CeD. Children (≤16 years) with biopsy-confirmed CeD from 2001 through 2022 were identified from a Swedish nationwide histopathology cohort "ESPRESSO" (n=13,576) and matched with ≤5 reference individuals from the general population (n=66,068) by sex, birth year, calendar year of diagnosis, and county of residence. ARFID-like phenotype was identified in the Swedish National Patient Register via the tenth revision of the International Classification of Diseases (ICD)-10 codes F98.2 and R63.3 (as an extension of infant or early childhood feeding disorders according to DSM-5, the specific code for ARFID has only been introduced in ICD-11). To mitigate potential detection bias, follow-up started one year after CeD diagnosis or matching until incident eating disorders, or the earliest occurrence of 18th birthday, death, emigration, or 31 December 2023. The adjusted hazard ratio (aHR) was estimated using Cox regression. In sensitivity analyses, we excluded conditions that may cause secondary eating disturbances to increase the specificity for ARFID, and addressed intra-familial factors via comparison with CeD-free full siblings.
Results
Over a median follow-up of 12.6 years, 89 children with CeD had an ARFID-like diagnosis before adulthood, compared to 160 reference individuals (incidence rate: 57 vs. 21 per 100,000 person-years). After adjusting for matching variables, country of birth, parental educational level, and specialist visit frequency, the aHR for ARFID-like phenotype in CeD was 1.70 (95% confidence interval:1.19 to 2.44). In subgroup analyses, the positive association was significant among boys and among those 6-11 years (Table 1). The association between CeD and childhood ARFID-like phenotype became non-significant when excluding conditions potentially causing secondary eating disturbances (aHR=1.36 [0.83 to 2.22]), while was similar when compard to CeD-free siblings (aHR=1.78 [0.96 to 3.31]).
Table 1. Incident ARFID-like phenotype in patients with CeD and their matched reference individuals, stratified by sex, age, and calendar period
|
|---|
ARFID: avoidant/restrictive food intake disorder; CeD: celiac disease; CI: confidence interval; HR: hazard ratio; IR: incidence rate a Index date: one year after CeD diagnosis/matching b Conditioned on the matching variables (birth year, sex, county of residence, and calendar year of index date) and further adjusted for country of birth, parental educational attainment, number of healthcare visits between two years and six months before the index date |
|
| Patients No. of events (IR, per 100,000 person-years)
| Matched reference individuals No. of events (IR, per 100,000 person-years)
| IR difference (95%CI), per 100,000 person-years | HR (95%CI) b |
| Age at index date, years a | 1-5 | 42 (80) | 80 (32) | 49 (24 to 74) | 1.31 (0.80 to 2.15) |
| 6-11 | 37 (67) | 58 (22) | 45 (23 to 68) | 2.32 (1.27 to 4.25) |
| 12-17 | 10 (21) | 22 (10) | 11 (-2 to 25) | 1.93 (0.53 to 7.04) |
| Sex | Female | 55 (57) | 114 (24) | 32 (17 to 48) | 1.36 (0.88 to 2.11) |
| Male | 34 (58) | 46 (16) | 42 (22 to 62) | 2.86 (1.47 to 5.58) |
| Calendar period at index date a | 2002-2012 | 53 (43) | 109 (18) | 24 (12 to 36) | 1.59 (1.03 to 2.46) |
| 2013-2023 | 36 (115) | 51 (34) | 81 (43 to 120) | 2.11 (1.03 to 4.32) |
Conclusion
Children with CeD, specifically boys and those diagnosed during primary school years, were at an increased risk of developing an ARFID-like phenotype. Clinicians should actively discuss with patients and their families about the mental distress when maintaining a gluten-free diet, and be cautious to avoid hypervigilance when guiding disease management.
Disclosure
MA is an employee of Takeda Pharmaceuticals and owns stock in this company.
JFL has coordinated a study on behalf of the Swedish IBD quality register (SWIBREG). That study received funding from Janssen Corporation. JFL has also received financial support from MSD developing a paper reviewing national healthcare registers and for research on IBD. JFL also has a research collaboration on celiac disease with Takeda.
The other authors report no disclosures relevant to the manuscript.